CVE-2026-43961

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (5th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2026-62411 (ENISA EUVD)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user running Vim.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 19, 2026

Last Modified

October 30, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
Patch available. Sources: redhat, github.
GitHub advisoryMentions a patch (unverified)

Vimscript Code Injection in netrw NetrwMarkFile() via crafted filename affects Vim < 9.2.0480 · Advisory · vim/vim · GitHub

https://github.com/vim/vim/security/advisories/GHSA-66hr-7p6x-x5j3
Red Hat

2460434 – (CVE-2026-43961) CVE-2026-43961 vim: Vimscript injection via unescaped filename in netrw s:NetrwMarkFile() filter() expression allows arbitrary code execution

https://bugzilla.redhat.com/show_bug.cgi?id=2460434
Red HatMentions a patch (unverified)

CVE-2026-43961 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-43961

Vendor Advisories for CVE-2026-43961(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuvim-tiny (2:7.4.052-1ubuntu3.1+esm28) @ trusty2026-10-30ubuntu
redhatvim-main-9.2.967-1.1.hum12026-08-20redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
vim—
  • every version up to 9.2.0481-r0: fixed in 9.2.0481-r0
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:9.0.1378-2 ... 2:9.2.0858-1 (45 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:9.1.1230-2 ... 2:9.2.0858-1 (19 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
vim2:9.1.1230-2 ... 2:9.2.0461-1 (16 versions)
  • every version up to 2:9.2.0524-1: fixed in 2:9.2.0524-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 11× in last 7d / 62× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 222 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 122 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  4. 2026-10-30 04:26 UTCEG score recompute
  5. 2026-10-30 04:26 UTCVendor advisory
  6. 2026-10-30 03:21 UTCEG score recompute
  7. 2026-10-30 03:21 UTCVendor advisory
  8. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-10-25 14:28 UTCEG score recompute
  14. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-24 05:37 UTCEG score recompute
  16. 2026-10-24 05:37 UTCVendor advisory
  17. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-10-18 03:39 UTCEG score recompute
  23. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  24. 2026-10-16 18:32 UTCEG score recompute
  25. 2026-10-16 18:32 UTCVendor advisory
Show 75 more
  1. 2026-10-16 17:52 UTCEG score recompute
  2. 2026-10-16 17:52 UTCVendor advisory
  3. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-16 13:33 UTCEG score recompute
  5. 2026-10-16 13:33 UTCVendor advisory
  6. 2026-10-16 12:35 UTCEG score recompute
  7. 2026-10-16 12:35 UTCVendor advisory
  8. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-12 16:05 UTCEG score recompute
  13. 2026-10-11 19:47 UTCEG score recompute
  14. 2026-10-11 17:02 UTCEG score recompute
  15. 2026-10-11 14:27 UTCEG score recompute
  16. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-10-08 08:32 UTCEG score recompute
  21. 2026-10-08 08:32 UTCVendor advisory
  22. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-10-07 10:29 UTCVendor advisory
  24. 2026-10-06 21:23 UTCEG score recompute
  25. 2026-10-06 21:23 UTCVendor advisory
  26. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  27. 2026-10-06 07:59 UTCEG score recompute
  28. 2026-10-06 07:59 UTCVendor advisory
  29. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  30. 2026-10-05 09:55 UTCEG score recompute
  31. 2026-10-05 09:55 UTCVendor advisory
  32. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  33. 2026-10-04 21:26 UTCVendor advisory
  34. 2026-10-04 05:26 UTCVendor advisory
  35. 2026-10-03 16:58 UTCEG score recompute
  36. 2026-10-03 16:58 UTCVendor advisory
  37. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  38. 2026-10-03 01:37 UTCEG score recompute
  39. 2026-10-03 01:37 UTCVendor advisory
  40. 2026-10-02 12:58 UTCVendor advisory
  41. 2026-10-01 22:48 UTCEG score recompute
  42. 2026-10-01 22:48 UTCVendor advisory
  43. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  44. 2026-10-01 09:47 UTCVendor advisory
  45. 2026-09-30 21:18 UTCEG score recompute
  46. 2026-09-30 21:18 UTCVendor advisory
  47. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  48. 2026-09-30 08:50 UTCEG score recompute
  49. 2026-09-30 08:50 UTCVendor advisory
  50. 2026-09-28 21:44 UTCEG score recompute
  51. 2026-09-28 21:44 UTCVendor advisory
  52. 2026-09-28 08:08 UTCVendor advisory
  53. 2026-09-27 19:32 UTCEG score recompute
  54. 2026-09-27 19:32 UTCVendor advisory
  55. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  56. 2026-09-27 07:04 UTCEG score recompute
  57. 2026-09-27 07:04 UTCVendor advisory
  58. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  59. 2026-09-25 00:54 UTCEG score recompute
  60. 2026-09-25 00:54 UTCVendor advisory
  61. 2026-09-24 11:58 UTCVendor advisory
  62. 2026-09-23 23:29 UTCEG score recompute
  63. 2026-09-23 23:29 UTCVendor advisory
  64. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  65. 2026-09-23 10:49 UTCVendor advisory
  66. 2026-09-22 22:03 UTCEG score recompute
  67. 2026-09-22 22:03 UTCVendor advisory
  68. 2026-09-22 09:34 UTCEG score recompute
  69. 2026-09-22 09:34 UTCVendor advisory
  70. 2026-09-22 08:58 UTCEG score recompute
  71. 2026-09-22 08:58 UTCVendor advisory
  72. 2026-09-22 00:58 UTCEG score recompute
  73. 2026-09-22 00:58 UTCVendor advisory
  74. 2026-09-21 12:30 UTCEG score recompute
  75. 2026-09-21 12:30 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-43961?
CVE-2026-43961 is a high-severity vulnerability; its CVE record was published on August 19, 2026. A flaw was found in Vim's netrw plugin. A crafted filename containing quote characters and expression fragments can break out of the quoted context during mark/unmark operations, allowing arbitrary Vimscript execution. This can be leveraged to run shell commands with the privileges of the user…
When was CVE-2026-43961 made public?
CVE-2026-43961 was made public on August 19, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on August 19, 2026. EchelonGraph's copy of the record carries a last-modified date of October 30, 2026; the record at its source may have been updated since.
Is CVE-2026-43961 actively exploited?
CVE-2026-43961 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43961?
CVE-2026-43961 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-43961?
A fix for CVE-2026-43961 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43961 are linked in the Vendor Advisories panel on this page.

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